Editing Gato-class submarine (section)

===Foreign service===
The large numbers of relatively modern, but surplus U.S. fleet submarines proved to be popular in sales, loans, or leases to allied foreign navies. While most of these ships were of the more capable ''Balao'' and ''Tench'' classes, some ''Gato''s went overseas, as well. Italy received two ({{USS|Barb|SS-220|2}} and {{USS|Dace|SS-247|2}}), which received the only GUPPY conversions given to ''Gato''-class ships (Guppy IB).<ref name="List of GUPPY IB conversions"/> Japan received one ({{USS|Mingo|SS-261|2}}), Brazil two ({{USS|Muskallunge|SS-262|2}} and {{USS|Paddle|SS-263|2}}), Greece two ({{USS|Lapon|SS-260|2}} and {{USS|Jack|SS-259|2}}), and Turkey two ({{USS|Guitarro|SS-363|2}} and {{USS|Hammerhead|SS-364|2}}). The ships transferred to Japan and Brazil did not receive any modernizations (streamlining and snorkels) prior to transfer, but the four ships sent to Greece and Turkey did receive snorkels and partial streamlining to the fairwater.<ref>{{harvnb|Alden|1979|loc=Part V}}. '''Note''': Alden makes a rare error here. ''Guitarro'' and ''Hammerhead'' '''did not''' receive the standard U.S. Navy "Fleet Snorkel" conversion '''prior''' to transfer, as he stated in the Part V addenda. See [https://navsource.org/archives/08/265/0836321a.jpg USN Photo NY9-21880-7-54 for Guitarro] and  [https://navsource.org/archives/08/419/0836472b.jpg Navsource.org photo 0836472b for Hammerhead]. Although they did receive full snorkel installations, ''Guitarro'' and ''Hammerhead''{{'}}s conversions were very similar to ''Jack'' and ''Lapon'' in that their conning tower fairwaters and snorkels received only a partial streamlining. The periscope shears and covered wagon ribs were left exposed. The official Fleet Snorkel conversion had a GUPPY-style fully enclosed and streamlined fairwater/snorkel, hence called a "sail". The confusion probably stemmed from the fact that in post-transfer overhauls (probably done in the U.S. but paid for by the Greeks) both ships received GUPPY-style sails.</ref>